Antirattling device and lock for windows



Sept. 13, 1938. c. PEARSON I AN'IIRATTLING DEVICE AND LOCK FOR WINDOWS Filed April 21, 1937 In T P A S E L A H C Patented Sept. 13, 1938 UNITED STATES ANTIRATTLIN G DEVICE AND LOOK FOR WINDOWS Charles Pearson, Ingersoll, Ontario, Canada, assignor of one-half to George W. Mallory, Blenheim, Ontario, Canada Application April 21, 1937, Serial No. 138,275

1 Claim.

The invention relates to window locking means and has for its object the obtaining of a simple construction which can be easily applied to any window and will form both a lock and an antirattling device. To this end the invention consists in the construction as hereinafter set forth.

In the drawing:

Figure 1 is a sectional perspective view showing my improved locking device and anti-rattler as applied to a window casing and in position to lock the Window sash from being raised;

Figure 2 is a side elevation partly in section showing the device in position to hold the sash from falling;

5 Figure 3 is an enlarged cross section on line 33 of Figure 2.

The device comprises a plate A which may be secured either to the window casing or to the window sash, by means of screws B engaging 20 corresponding apertures at opposite ends of said plate. Centrally between and at one side of said screws the plate A is provided with a boss C having a central bore therein threaded to receive the threaded portion D of a shoulder bolt E. This 25 bolt has an outer portion F of larger diameter and a head portion G of still larger diameter. Journaled on the portion F and arranged between the head G and boss C is a member H. This member has an arm I projecting from one side thereof 30 and enlarged to form a socket J for receiving the shank K of a button or knob L formed of resilient material, preferably rubber. The member H has also an oppositely extending arm M which forms a counterweight and which is at an angle to the arm I of less than 180. This counterweight normally holds the arm I and button L in substantially horizontal position when free from any obstruction. However, in securing the plate A to the window casing it is so positioned relative to the sash that the button L in horizontal position with the arm I will intercept the path of movement of the sash. Consequently, when the sash N is closed the arm I is compelled to take an oblique angular position. This position may either be an inclination downward from the axis of the journal F, as shown in Figure 1, or an inclination upward as shown in Figure 2. It is also possible to turn the arm I from the one position to the other while the sash is closed, in-

50 asmuch as the length of the counterweight M is less than the distance from the axis of the journal F to the sash and will therefore swing clear of said sash.

In securing the devicethe screws B engage 55 the casing O and are positioned a proper distance from the sash N so as to cause the inclined position of the arm I as above described. The device is then capable for use either for locking the sash down or for holding it in a raised position at any desired point. For the first func- 5 tion the arrangement is as shown in Figure 1 and and it will be understood that the arm I and button L due to the pressure of the counterweight will be within the angle of friction so that any attempt to raise the sash will only develop greater 10 friction of the button and resistance to such movement. When it is desired to raise the sash the counterweight M is lifted and swung over so as to change the position of the parts to that shown in Figure 2. Here the arm I and button L are again within the angle of friction and therefore any downward movement of the sash will only increase the friction and resistance to such movement. Thus when the sash is raised it will be held from downward movement in every position of adjustment, thereby dispensing with the necessity of counterweights for the sash. When it is desired to lower the sash thecounterweight M is swung downward toward the sash and then upward to restore the parts into the position shown in Figure 1.

An important function of the construction is the anti-rattling feature which is effective in all positions of adjustment of the sash. While I have only shown my device as applied to the window casing for engagement with the sash, itis obvious that it could be equally well applied to the sash for engagement with the casing.

What I claim as my invention is:

A locking and anti-rattling device for a window sash member, the sash member being slidable in a casing member, said device comprising a plate, a pivot pin projecting from said plate, an arm pivoted on said pin, a resilient element secured to the end of said arm, said arm being of such a length that when said plate is secured to one of said members said arm extends toward the other of said members and the end face of said element is spaced from said pivot pin a distance substantially greater than the shortest distance between the pin and said other member, said end face being adapted to frictionally engage said other member to prevent movement of the other member in one direction but permit movement thereof in the opposite direction, said arm being inclined to the horizontal when so engaging said other member, a counterweight arm projecting from said first mentioned armat such an angle thereto as to normally hold said first mentioned arm in substantially horizontal position when unobstructed, said counterweight arm being substantially shorter than the shortest distance between said pin and said other member when the plate is secured to said one member as aforesaid to permit manual swinging of the first mentioned 5 arm outward from an upwardly inclined position to a downwardly inclined position, said arms being so balanced that the resilient element normally tends to constantly engage said other member when said first mentioned arm is in either of said inclined positions. A

CHARLES PEARSON. 

